I create a shopping cart and assign a source to it (essentially ensure it does not go through sourcing). I approve the shopping cart. When I check the related documents, I see the Purchase Order in SAVED status, but not ordered.

If the Purchaser logs in and pulls up the shopping cart and hits the ORDER button (without changing anything in the Shopping Cart) it gets ordered.

However, this step should not be required....and it should get Ordered without Purchaser interference.